乌梁素海水体中叶绿素a时空变化特征分析

Seasonal Variation and Distribution of Chlorophyll-a in WuliangsuHai Lake

使用乌梁素海的水体理化指标监测数据,分析了乌梁素海叶绿素a的时空分异特征,并同时分析其与水质因子关系。研究表明：乌梁素海叶绿素a浓度具有明显的时空分布特征,叶绿素a含量全湖变化在8.38-27.50mg/m3,在空间分布上,北部区〉南部区、西岸〉东岸,由北部区到南部区逐渐减小;在时间上,夏季〉秋季〉春季,叶绿素a浓度变化与温度、透明度、总氮、总磷透明度等有关,参照富营养评价标准乌梁素海水体处于富营养状态。

Based on the monitoring data of the water quality factors in recent 3 years,the paper makes an analysis of the space-time distribution characteristic of the water body Chlorophyll-a of the Wuliangsuhai Lake and it also attaches an analysis of the relationship between Chlorophyll-a and the water quality factor.The results indicate that the concentration of the Chlorophyll-a is varying noticeably with the time and the location and the water body Chlorophyll-a of the Wuliangsuhai Lake is 8.38~27.50 mg/m3.The spatial distribution of Chlorophyll-a concentration of north region is higher than concentration of south region and it is higher in the west coast and lower in the east coast.From north to south,Chlorophyll-a concentration is decreased.The time distribution of the concentration is the highest in August and lowest in spring.The concentration of the Chlorophyll-a overall has a negative correlation with the SD but a positive correlation with the WT,TP and the TN.According to eutrophication evaluation criteria,this means that the Wuliangsuhai Lake being in state of eutrophication.